Tongdui Village was in crisis due to a bad debt, and Yin Jiuyou came to the door as a "creditor" to press for debt. When everyone thought Tongdui Village was going to be doomed, Shen Zhiyi accurately pointed out the errors in Yin Jiuyou's accounts, which made him lose face and look at him with admiration. Yin Jiuyou proposed a "debt restructuring plan": he became a shareholder of Tongduizhuang in the form of "technical equity participation" to help Tongduizhuang tide over the difficulties, on the condition that Shen Zhiyi must personally be responsible for his accounts. From then on, the small accountant was forced to become the prince's personal financial advisor.
